Elastic parameters such as Young’s modulus (YM) and Poisson’s ratio (PR) are determined by populating stress-strain relations with forces and displacements measured near the drill bit. The elastic parameters are used in a number of engineering and geophysical applications, including in-situ stress estimation, hydrofracture modeling, and elastic parameter mapping with seismic data.

In the figure to the left, Fracture ID’s YM and PR (black) correlate well with the sonic wireline YM and PR (blue) in sections where the sonic semblance is coherent.